Signs it's time
- 1Black mould spots that won't clean off.
- 2Gaps, cracks or silicone peeling away from the bath or tiles.
- 3Water marks on the ceiling below the bathroom, or loose tiles.
How it's done properly
All the old silicone has to come off first — new sealant won't stick to old. The joint is cleaned, treated to kill any mould and left to dry completely. The bath is then filled with water before sealing, so its weight opens the joint to its widest; that stops the new seal cracking the first time someone gets in.
Use an anti-mould sanitary silicone, run it in one smooth bead, and leave it to cure for at least 24 hours before using the bath or shower.
What you'll need
- Anti-mould sanitary siliconeView on Amazon
- Sealant gunView on Amazon
- Silicone removal & finishing tool kitView on Amazon
- Mould & mildew remover sprayView on Amazon
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Rather leave it to a pro?
We reseal baths and showers regularly — neat, even lines that last, and we fill the bath first so the seal doesn't crack.